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Meaning of 差之千里

Lookup via: Pinyin | Radicals
差 chā 之 zhī 千 qiān 里 lǐ HSK 4
to be a thousand 里 |里 [li3] astray; to make big mistake (idiom)
Example Sentences
1
一位老朋友曾经是这样说的
:
当你向太空发射一枚火箭时
,
发射轨道失之毫厘
,
进入绕地轨道时它就会差之千里
。
An old friend of mine once described it this way: When you send a rocket out into space, if its launch trajectory is off by inches, it can be off by miles out in orbit.